Data set 01
1936 Cossor Valve Manual
Published operating points and test conditions from this source.
SECTION 1
Pentode
Other
Optimum load
7500 ohm
Published datasheet value
Power - Pentode (NOT beam) ·Pentode
220PT
Power/output pentode designed for Class-A, single-ended, or push-pull audio-frequency output amplification.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- B5
- Base pins
- 5
- Nominal heater
- 2 V / 200 mA
Description
Two-volt power pentode for high undistorted audio output.
Socket description
European 5-pin base
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- B5
- Base pins
- 5
- Nominal heater voltage
- 2 V
- Nominal heater current
- 200 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
Terminal pinout
Electrical assignments shared by every tube using this base designation.
No verified pinout is recorded for this base designation.
Section ratings
1 physical section, each with unique specifications.
Section 1
Pentode
X-ray radiationInterelectrode capacitances
- Transconductance
- 0.0025 S
- Max plate voltage
- 150 V
- Max screen voltage
- 150 V
Published ratings/characteristics promoted from the approved datasheet.
Source-dependent data
Operating conditions by source
Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.
Data set 02
193X Cossor
Published operating points and test conditions from this source.
SECTION 1
Pentode
Other
Filament/Heater Current
200 mA
Published technical-data value
Maximum Anode Voltage
150 V
Published technical-data value
Maximum Screen Voltage
150 V
Published technical-data value
Characteristics
Mutual Conductance
2500 µS
Published technical-data value